Appen dix A: Calc ulating Flow Rate
Airmetrics
65
(6)
(7)
(8)
4.
To finally calculate the concentration of PM, divide the net mass gain of the
filter by the volume of air that passed throug h the filter.
or
where
[ P M ]
act
= PM concen tration, in µg rams pe r cubic m eter (actual)
[ P M ]
std
= PM concentration, in µgrams per cubic meter (standard)
M
PM
= M ass of partic ulate ma tter collected on the filter, in
µgrams
Airmetrics MiniVol Users Guide
66
Airmetrics
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